Computer graphics processing and selective visual display system – Display peripheral interface input device – Light pen for fluid matrix display panel
Patent
1996-03-19
1999-12-28
Lao, Lun-Yi
Computer graphics processing and selective visual display system
Display peripheral interface input device
Light pen for fluid matrix display panel
345213, G09G 512
Patent
active
060087919
ABSTRACT:
It is an object to enable an optimum video display to be obtained by automatically adjusting a display size and a display position of a video image even when any kind of video signal is supplied. A comparator detects a video display period of a video signal a and generates a detection signal b. A counter, latch circuits, comparing circuits, and the like form information of the start position or end position of the video display period of the video signal a and period information of the video signal a. An arithmetic operation control circuit generates control information of the display size, display position, and the like from those information by arithmetic operations by using a detection signal b and a horizontal sync signal h. A memory holds the control information. The control information is read out when a power source of the display is turned on at the next time.
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Arai Ikuya
Kitou Kouji
Miura Jun
Hitachi , Ltd.
Lao Lun-Yi
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